ICU-special portable nebulization device enabling autonomous respiration according to airflow

ABSTRACT

Disclosed is an ICU-special portable nebulization device enabling autonomous respiration according to airflow, which includes a nebulization control host, a nebulization generator provided on the nebulization control host, and a tee connecting pipe provided on the nebulization generator; the nebulization generator comprises a bottom housing, a medicinal solution tank provided on the bottom housing and spaced apart from a space of the bottom housing, a medicinal solution outlet provided on the bottom of the medicinal solution tank, an air guide port provided on the bottom housing at the same side as the medicinal solution outlet, a nozzle tube sheathed on the periphery of the medicinal solution outlet and the air guide port, a partition provided in the nozzle tube which separates the medicinal solution outlet and the air guide port.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a national stage filing under 35 U.S.C. § 371 ofinternational application number PCT/CN2018/116509, filed Nov. 20, 2018,which claims priority to Chinese patent application No. 201810892265.5,filed Aug. 7, 2018 and Chinese patent application No. 201821265331.8,filed Aug. 7, 2018. The contents of these applications are incorporatedherein by reference in their entirety.

TECHNICAL FIELD

The present invention relates to the field of medical devices, inparticular to an ICU-special portable nebulization device enablingautonomous respiration according to airflow.

BACKGROUND

In the field of modern clinical medicine, the ventilator, as a means ofreplacing artificial spontaneous ventilation, has been widely used inrespiratory failure due to various reasons, anesthesia breathingmanagement during major operations, respiratory support therapy, andemergency resuscitation. Ventilator plays an important role in the fieldof modern medicine, especially in the ICU ward. The ventilator has thefunction of providing power to transport air, can replace the work ofthe human body's own respiratory muscles, and can produce a certainrespiratory rhythm, including respiratory frequency and inspiration andexpiration ratio. In addition, it can also replace the function ofrespiratory central nervous system of a human body to control therespiratory rhythm, providing suitable tidal volume (VT) or minuteventilation (MV) to meet the needs of respiratory metabolism. The airsupplied by the ventilator is preferably heated and humidified toreplace the function of the human nasal cavity, and can supply more O₂than which is contained in the atmosphere to increase the concentrationof inhaled O₂ and improve oxygenation. The ventilator treatment bynebulization inhalation is an important and effective treatment methodamong the treatment methods for respiratory system diseases, which usesan atomizer to atomize the medicinal solution into tiny particles forinhalation by a user into the respiratory tract through breathing. Themedication is deposited in lungs and is then absorbed through the mucousmembrane of lungs, thus achieving the goal of painless, rapid andeffective treatment. Therefore, a nebulization treatment device that caneffectively cooperate with a ventilator is very important for thepatients. However, the existing nebulization device used with theventilator has the defect that it cannot actively determine therespiratory frequency of the ventilator. The nebulization device usuallysprays according to the same frequency as the respiratory frequency ofthe ventilator that has been set. In addition, there are high operationrequirements for users during actual use, and the problem that thenebulization frequency is not synchronized with the respiratoryfrequency easily occurs, which is very dangerous for the patients.

SUMMARY

In view of the above-mentioned problems, an object of the presentinvention is to provide an ICU-special portable nebulization deviceenabling autonomous respiration according to airflow, which activelydetects the respiratory state of a ventilator and matches therespiratory frequency, and is simple and convenient to operate.

In order to achieve the above object, the present invention provides anICU-special portable nebulization device enabling autonomous respirationaccording to airflow, including: a nebulization control host, anebulization generator provided on the nebulization control host, and atee connecting pipe provided on the nebulization generator. Thenebulization generator includes a bottom housing, a medicinal solutiontank provided on the bottom housing and spaced apart from a space of thebottom housing, a medicinal solution outlet provided on the bottom ofthe medicinal solution tank, an air guide port provided on the bottomhousing at the same side as the medicinal solution outlet, a nozzle tubesheathed on the periphery of the medicinal solution outlet and the airguide port, a partition provided in the nozzle tube which separates themedicinal solution outlet and the air guide port, a nebulization sheetprovided between the medicinal solution outlet and the nozzle tube, anda first circuit board provided in the bottom housing which is connectedwith the nebulization sheet. The partition in the nozzle tube separatesthe interior of the nozzle tube into a nebulization cavity communicatedwith the medicinal solution outlet and an air cavity communicated withthe air guide port. A sensor connected with the first circuit board isprovided in the air cavity. The nozzle tube on the side of the aircavity is provided with a cross-section stopper that blocks the openingof the air cavity. A first ventilation port and a second ventilationport communicated with the air cavity are provided on two sides of thestopper, respectively. The first circuit board extends to the outside ofthe bottom housing and is connected with the nebulization generator. Thenebulization cavity and the air cavity are independent from each other,and the air cavity will not affect the nebulization while detecting thestate of the working airflow of the ventilator without affecting at thesame time, so that the airflow detection and the nebulization spray donot interfere with each other.

In some embodiments, the nebulization control host includes a housing, asecond circuit board provided in the housing, and a button and anindicator light provided on the housing which are connected with thefirst circuit board.

In some embodiments, the second circuit board includes a main controlunit, a power supply circuit connected with the main control unit, and anebulization driving unit and a battery respectively connected with thepower supply circuit. The button and indicator light are respectivelyconnected with the main control unit. The second circuit board isprovided with four metal contacts in sequence, which are respectively adetection point A connected with the main control unit, a negativeelectrode B of the circuit and a nebulization positive electrode Crespectively connected with the nebulization driving unit, and apositive electrode D of the power supply connected with the battery.Therefore, the detection point A is connected with the sensor and themain control unit, respectively, and is used to collect signal outputsof the sensor; the negative electrode B of the circuit is connected withthe nebulization driving unit, the nebulization sheet and the sensor,respectively, and is shared by the sensor and the nebulization sheet;the positive electrode C of the nebulization is connected with thenebulization driving unit and the nebulization sheet, respectively toprovide an alternating voltage required by the nebulization sheet foroperation; and the positive electrode D of the power supply is connectedwith the power supply circuit and the sensor, respectively, to provide adirect voltage required by the sensor for operation.

In some embodiments, the first circuit board is provided with four metalcontacts in sequence, which are a first contact conducted with thedetection point A, a second contact conducted with the negativeelectrode B of the circuit, a third contact conducted with thenebulization positive electrode C, and a fourth contact conducted withthe positive electrode D of the power supply. The first contact isconnected with the sensor, the second contact is connected with thesensor and the nebulization sheet respectively, the third contact isconnected with the nebulization sheet, and the fourth contact isconnected with the sensor. The main control unit is electricallyconnected with the sensor, and the nebulization driving unit isconnected with the nebulization sheet.

In some embodiments, interfaces are provided on the housing at positionscorresponding to the four metal contacts for facilitating conduction ofthe first circuit board with the metal contacts of the second circuitboard after the first circuit board is inserted.

In some embodiments, the power supply circuit includes a DC-ACconversion circuit and a booster circuit; and the nebulization sheet andthe sensor use AC voltage and DC voltage, respectively. In addition, thepower supply circuit may further include a charging circuit, a powerswitching circuit, and a rechargeable battery, and is switched to anexternal power supply when an external AC voltage is connected

In some embodiments, the nebulization control host is provided with aclamp for fixing the nebulization control host to the rails of ahospital bed or a table side. The clamp includes a base, an invertedbuckle for fixing the nebulization control host on the base, and amovable clip for clamping the whole to the rails of the hospital bed orthe table side.

In some embodiments, left and right ends of the tee connecting pipe arerespectively provided with a connecting pipe for connecting with anexternal piping of the ventilator and a face mask. The above connectionmay be implemented by interference fit connection to make the connectionstructure simpler. The left and right ends of the tee connecting pipehave different aperture sizes so as to distinguish different portsconnecting the ventilator and the face mask. It may be the case that oneof the left and right ends of the tee connecting pipe with a largeraperture size is connected with the ventilator, and the other end with asmaller aperture size is connected with the face mask.

In some embodiments, the tee connecting pipe is connected with thenozzle tube. Therefore, a middle port of the tee connecting pipe isconnected with the nebulization generator, and the connection thereofmay also adopt interference fit connection.

In some embodiments, an inclined bottom surface facing the medicinalsolution outlet is provided on the bottom, and an upper cover isprovided on the medicinal solution tank.

The present invention has the beneficial effect that it actively detectsthe respiratory state of the ventilator and matches the respiratoryfrequency, and is simple and convenient to operate. Since the left andright ends of the tee connecting pipe are respectively provided with theconnecting pipe for connecting with the external piping of theventilator and the face mask, and a middle pipe is communicated with thenebulization generator, the user may ventilate into the pipe. When theventilator operates, an internal airflow change is detected and judgedby the sensor in the air cavity, and then the respiratory state of theventilator is obtained. When the sensor detects an air flow in the aircavity, the first circuit board sends a signal to the nebulizationcontrol host, and then the nebulization control host drives thenebulization driving unit to atomize the medicinal solution for drugdelivery to the nebulization sheet in the nozzle tube, so that not onlythe purpose of combining respiratory therapy with nebulization therapyis achieved, but also the therapeutic effect on the disease is better,avoiding the defect that the nebulization and the respiration are notsynchronized. In addition, since the operation requirements on users arelow during use, the present invention has the effects of simplicity andconvenience. In addition, the nebulization generator and thenebulization control host, as well as their connecting wires can bedetachably connected, which is convenient for cleaning and replacingcomponents such as the nebulization generator, and the product can bedisassembled, which is convenient to carry, thereby realizing the effectof convenient use.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic structural diagram of the tee connecting pipe andthe nebulization generator after assembly;

FIG. 3 is a schematic structural diagram of the interior of the teeconnecting pipe and the nebulization generator after assembly;

FIG. 4 is a schematic structural diagram of the nebulization generatorafter assembly;

FIG. 5 is a schematic structural diagram of the nebulization controlhost;

FIG. 6 is a schematic block diagram showing connection between thesecond circuit board and the first circuit board; and

FIG. 7 is a circuit diagram of the second circuit board.

DETAILED DESCRIPTION

The present invention will be further described in detail below inconjunction with the drawings.

As shown in FIGS. 1-6 , an ICU-special portable nebulization deviceenabling autonomous respiration according to airflow includes anebulization control host 03, a nebulization generator 02 provided onthe nebulization control host 03, and a tee connecting pipe 01 providedon the nebulization generator 02.

The nebulization generator 02 includes a bottom housing 21, a medicinalsolution tank 22 provided on the bottom housing 21 and spaced apart froma space of the bottom housing 21, a medicinal solution outlet 23provided on the bottom of the medicinal solution tank 22, an air guideport 24 provided on the bottom housing 21 at the same side as themedicinal solution outlet 23, a nozzle tube 25 sheathed on the peripheryof the medicinal solution outlet 23 and the air guide port 24, apartition 26 provided in the nozzle tube 25 which separates themedicinal solution outlet 23 and the air guide port 24, a nebulizationsheet 27 provided between the medicinal solution outlet 23 and thenozzle tube 25, and a first circuit board 28 provided in the bottomhousing 21 which is connected with the nebulization sheet 27. Thepartition 26 in the nozzle tube 25 separates the interior of the nozzletube 25 into a nebulization cavity 29 communicated with the medicinalsolution outlet 23 and an air cavity 210 communicated with the air guideport 24. A sensor 211 connected with the first circuit board 28 isprovided in the air cavity 210. The nozzle tube 25 on the side of theair cavity 210 is provided with a cross-section stopper 212 that blocksthe opening of the air cavity 210. A first ventilation port 213 and asecond ventilation port 214 communicated with the air cavity 210 areprovided on two sides of the cross-section stopper 212, respectively.The first circuit board 28 extends to the outside of the bottom housing21 and is connected with the nebulization generator 0202. Thenebulization cavity 29 and the air cavity 210 are independent from eachother, and the air cavity 210 will not affect the nebulization whiledetecting the state of the working airflow of the ventilator, so thatthe airflow detection and the nebulization spray do not interfere witheach other. In addition, the sensor 211 is an air flow sensor 211 or anair pressure sensor.

The nebulization control host 03 includes a housing 31, a second circuitboard 32 provided in the housing 31, and a button 33 and an indicatorlight 34 provided on the housing 31 which are connected with the secondcircuit board 32. The second circuit board 32 includes a main controlunit, a power supply circuit connected with the main control unit, and anebulization driving unit and a battery respectively connected with thepower supply circuit. The button 33 and indicator light 34 arerespectively connected with the main control unit. The second circuitboard 32 is provided with four metal contacts in sequence, which arerespectively a detection point A connected with the main control unit, anegative electrode B of the circuit and a nebulization positiveelectrode C respectively connected with the nebulization driving unit,and a positive electrode D of the power supply connected with thebattery. The detection point A is connected with the sensor 211 and themain control unit, respectively, and is used to collect signal outputsof the sensor; the negative electrode B of the circuit is connected withthe nebulization driving unit, the nebulization sheet 27 and the sensor211, respectively, and is shared by the sensor 211 and the nebulizationsheet 27; the nebulization positive electrode C is connected with thenebulization driving unit and the nebulization sheet 27, respectively toprovide an alternating voltage required by the nebulization sheet 27 foroperation; and the positive electrode D of the power supply is connectedwith the power supply circuit and the sensor 211, respectively toprovide a direct voltage required by the sensor 211 for operation. Thefirst circuit board 28 is provided with four metal contacts in sequence,which are a first contact conducted with the detection point A, a secondcontact conducted with the negative electrode B of the circuit, a thirdcontact conducted with the nebulization positive electrode C, and afourth contact conducted with the positive electrode D of the powersupply. The first contact is connected with the sensor 211, the secondcontact is connected with the sensor 211 and the nebulization sheet 27,the third contact is connected with the nebulization sheet 27, and thefourth contact is connected with the sensor 211. The main control unitis connected with the sensor 211. The nebulization driving unit isconnected with the nebulization sheet 27 for the purpose of detecting anair flow in the tee connecting pipe, sending a signal, and beingcontrolled by the nebulization control host 03 to atomize the medicinalsolution. Interfaces 35 are provided on the housing 31 at positionscorresponding to the four metal contacts for facilitating conduction ofthe first circuit board 28 with the metal contacts of the second circuitboard 32 after the first circuit board 28 is inserted. The power supplycircuit includes a DC-AC conversion circuit and a booster circuit; andthe nebulization sheet 27 and the sensor 21 use AC voltage and DCvoltage, respectively. In addition, the power supply circuit may furtherinclude a charging circuit, a power switching circuit, and a battery,and is switched to an external power supply when an external AC voltageis connected. The nebulization control host 03 is provided with a clamp04 for fixing the nebulization control host 03 to rails of a hospitalbed or a table side. The clamp 04 includes a base 41, an inverted buckle42 for fixing the nebulization control host 03 on the base 41, and amovable clip 43 for clamping the whole to the rails of the hospital bedor the table side. Left and right ends of the tee connecting pipe arerespectively provided with a connecting pipe for connecting with anexternal piping of the ventilator and a face mask. The above connectionmay be implemented by interference fit connection to make the connectionstructure simpler. The left and right ends of the tee connecting pipehave different aperture sizes in order to distinguish the differentports connecting the ventilator and the face mask. It may be the casethat one of the left and right ends of the tee connecting pipe with alarger aperture size is connected with the ventilator, and the end witha smaller aperture size is connected with the face mask. The teeconnecting pipe is connected with the nozzle tube 25. A middle port ofthe tee connecting pipe is connected with the nebulization generator0202, and the connection method thereof may also adopt interference fitconnection. An inclined bottom surface 213 facing the medicinal solutionoutlet 23 is provided at the bottom, and an upper cover 212 is providedon the medicinal solution tank 22. The left and right ends of the teeconnecting pipe 01 are respectively provided with the connecting pipefor connecting with the external piping of the ventilator and the facemask, and a middle pipe is communicated with the nebulization generator02. The user can ventilate into the pipe. When the ventilator operates,an internal airflow change is detected and judged by the sensor 211 inthe air cavity 210, and then the respiratory state of the ventilator isobtained. When the sensor 211 detects an air flow in the air cavity 210,the first circuit board 28 sends a signal to the nebulization controlhost 03, and then the nebulization control host 03 drives thenebulization driving unit to atomize the medicinal solution for drugdelivery to the nebulization sheet 27 in the nozzle tube 25, so that notonly the purpose of combining respiratory therapy and nebulizationtherapy is achieved, but also the therapeutic effect on the disease isbetter, avoiding the defect that the nebulization and the respirationare not synchronized. In addition, since the operation requirements onusers are low during use, the present invention has the effects ofsimplicity and convenience. In addition, the nebulization generator 02and the nebulization control host 03, as well as their connecting wirescan be detachably connected, which is convenient for cleaning andreplacing components such as the nebulization generator 02, and theproduct can be disassembled, which is convenient to carry, therebyrealizing the effect of convenient use.

If the sensor 211 adopts an air pressure sensor, an air pressure can bedetected. When the sensor 211 in the nebulization generator 02 detectsthat there is air flow, it sends a corresponding signal to thenebulization control host 03. If the main control unit reads a positivenumber, it represents a positive air pressure in the air cavity 210,which means that the ventilator is in an expiration state at this time,meanwhile the nebulization sheet 27 in the nebulization generator 02 isdriven to atomize, and the atomized medicinal solution will enter thepatient's mouth through the tee connecting pipe and the face masktogether with the air supply of the ventilator. If the main control unitreads a negative number, it represents a negative air pressure in theair cavity 210, which means that the ventilator is in an inspirationstate at this time, and the main control unit should control thenebulization generator 02 to stop nebulization of the nebulization sheet27 at this time.

If the sensor 211 adopts an air flow sensor, an instantaneous flow rateand direction of the gas air can be detected. The positive or negativedata read by the main control unit represent different flow directionsof the air. For example, a positive number may represent that the airflows from the port of ventilator to the inside of the tee connectingpipe, that is, the ventilator is in the expiration state at this time;and a negative number may represent that the air flows from the insideof the tee connecting pipe to the port of ventilator, that is, theventilator is in the inspiration state at this time, and whether thenebulization generator 02 sprays in different states is consistent withthe air pressure sensor.

As shown in FIG. 7 , U5 is a boost pressure 1C in a booster circuit ofthe power supply circuit. The DC voltage is converted into the ACvoltage through an oscillation circuit composed of several inductors andcapacitors in the circuit, and then boosted by a field effect transistorQ3, and finally led from point C to be used as the nebulization positiveelectrode to supply power to the nebulization sheet. Point D isconnected with the DC voltage to serve as the positive electrode of thepower supply to supply power to the sensor. Point A is the detectionpoint for receiving the data of sensor, and is connected with a signalinput pin of the main control unit for receiving data. Point B is thenegative electrode of the circuit, which is shared by the sensor and thenebulization sheet as negative electrode and is connected with a groundwire.

What have been described above are only some embodiments of the presentinvention. For those of ordinary skill in the art, various modificationsand improvements may be made without departing from the inventiveconcept of the present invention, which are all within the protectionscope of the present invention.

The invention claimed is:
 1. An ICU-special portable nebulization deviceenabling autonomous respiration according to airflow, comprising anebulization control host, a nebulization generator provided on thenebulization control host, and a tee connecting pipe provided on thenebulization generator; wherein the nebulization generator comprises abottom housing, a medicinal solution tank provided on the bottom housingand spaced apart from a space of the bottom housing, a medicinalsolution outlet provided on the bottom of the medicinal solution tank,an air guide port provided on the bottom housing at the same side as themedicinal solution outlet, a nozzle tube sheathed on the periphery ofthe medicinal solution outlet and the air guide port, a partitionprovided in the nozzle tube which separates the medicinal solutionoutlet and the air guide port, a nebulization sheet provided between themedicinal solution outlet and the nozzle tube, and a first circuit boardprovided in the bottom housing which is connected with the nebulizationsheet; wherein the partition in the nozzle tube separates the interiorof the nozzle tube into a nebulization cavity communicated with themedicinal solution outlet and an air cavity communicated with the airguide port; a sensor connected with the first circuit board is providedin the air cavity; wherein the nozzle tube on the side of the air cavityis provided with a cross-section stopper that blocks the opening of theair cavity, a first ventilation port and a second ventilation portcommunicated with the air cavity are respectively provided on two sidesof the cross-section stopper; and wherein the first circuit boardextends to the outside of the bottom housing and is connected with thenebulization generator.
 2. The ICU-special portable nebulization deviceof claim 1, wherein the nebulization control host comprises a housing, asecond circuit board provided in the housing, and a button and anindicator light provided on the housing which are connected with thefirst circuit board.
 3. The ICU-special portable nebulization device ofclaim 2, wherein: the second circuit board comprises a main controlunit, a power supply circuit connected with the main control unit, and anebulization driving unit and a battery respectively connected with thepower supply circuit; the button and indicator light are respectivelyconnected with the main control unit; the second circuit board isprovided with four metal contacts in sequence, which are respectively adetection point A connected with the main control unit, a negativeelectrode B of the circuit and a nebulization positive electrode Crespectively connected with the nebulization driving unit, and apositive electrode D of the power supply connected with the battery. 4.The ICU-special portable nebulization device of claim 3, wherein: thefirst circuit board is provided with four metal contacts in sequence,which are respectively a first contact conducted with the detectionpoint A, a second contact conducted with the negative electrode B of thecircuit, a third contact conducted with the nebulization positiveelectrode C, and a fourth contact conducted with the positive electrodeD of the power supply; the first contact is connected with the sensor;the second contact is connected with the sensor and the nebulizationsheet; and the third contact is connected with the nebulization sheet;the fourth contact is connected with the sensor; and the main controlunit is electrically connected with the sensor, and the nebulizationdriving unit is connected with the nebulization sheet.
 5. TheICU-special portable nebulization device of claim 3, wherein interfacesare provided on the housing at positions corresponding to the four metalcontacts for facilitating conduction of the first circuit board with themetal contacts of the second circuit board after the first circuit boardis inserted.
 6. The ICU-special portable nebulization device of claim 3,wherein the power supply circuit comprises a DC-AC conversion circuitand a booster circuit; and the nebulization sheet and the sensor use anAC voltage and a DC voltage, respectively.
 7. The ICU-special portablenebulization device of claim 1, wherein: the nebulization control hostis provided with a clamp for fixing the nebulization control host torails of a hospital bed or a table side; the clamp comprises a base, aninverted buckle for fixing the nebulization control host on the base,and a movable clip that clamps the whole to the rails of the hospitalbed or the table side.
 8. The ICU-special portable nebulization deviceof claim 1, wherein left and right ends of the tee connecting pipe arerespectively provided with connecting pipes for connecting with anexternal piping of the ventilator and a face mask.
 9. The ICU-specialportable nebulization device of claim 1, wherein the tee connecting pipeis connected with the nozzle tube.
 10. The ICU-special portablenebulization device of claim 1, wherein: an inclined bottom surfacefacing the medicinal solution outlet is provided at the bottom; and anupper cover is provided on the medicinal solution tank.
 11. TheICU-special portable nebulization device of claim 8, wherein the teeconnecting pipe is connected with the nozzle tube.